A transparent item of a predetermined size that permits unobstructed and undistorted view of a desired area. It may include a frame, have reference markings, grid lines and may be heat strengthened and/or tinted. It is generally used where safety, security, and/or the restriction of foreign matter are required, such as the visual examination of the inside of pressurized tanks, liquid sights, controlled liquid flow, and inspection of equipment enclosed in a housing. See window (as modified); scale, cathode ray tube; scale, plotting; window, metal; window, wood; and window panel, aircraft.
Classification: Articles of plastics & articles of other materials of heading 3901 to 3914, nesoi
NSN 5965-00-035-4556
NSN 5950-01-517-4356
NSN 5990-01-201-4852
NSN 2925-00-467-7150
NSN 5915-01-187-5755
NSN 5935-01-548-2241
NSN 5895-00-939-1327
NSN 5960-00-947-5754
NSN 6130-01-398-9131
NSN 5950-00-329-6123
NSN 5985-00-935-0000
NSN 5965-01-335-1687